Literature DB >> 32447257

Chemical exchange induced Hahn echo modulation in pulsed electron paramagnetic resonance experiment.

Andrey A Bobko1.   

Abstract

Triarylmethyl (TAM) radicals are probes well suited to study microenvironment parameters using pulse electron paramagnetic resonance (EPR) due to their long relaxation times. Here, we are reporting the study of relaxation properties of monophosphonated TAM radicals in the presence of chemical exchange processes. The dependence of Hahn and inversion recovery echo on the solution pH and the chemical exchange rate are discussed. The modulation of Hahn echo intensity in solutions due to chemical exchange is observed in pulse EPR experiments. An analysis of the Hahn echo intensity decay allows for the quantitative determination of the chemical exchange rate and solution pH value.
Copyright © 2020 Elsevier Inc. All rights reserved.

Entities:  

Keywords:  Chemical exchange; Hahn echo; Pulsed electron paramagnetic resonance (EPR); Trityl radical

Year:  2020        PMID： 32447257      PMCID： PMC7282351          DOI： 10.1016/j.jmr.2020.106742

Source DB:  PubMed          Journal:  J Magn Reson        ISSN： 1090-7807            Impact factor:   2.229


  19 in total

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